Polanco was a big reason why Seattle's offense took a step forward in 2025. The former All-Star had a bounce-back season in his second campaign with the Mariners. In his first season in Seattle, Polanco slashed .213/.296/.355 with 16 homers and 45 RBIs in 118 games played.

The Mariners have found their leading candidate to be their backup catcher in 2026. The club is nearing an agreement on a Major League contract with veteran backstop Andrew Knizner, sources told MLB.com on Friday night,

The Seattle Mariners are in conversations with free agent catcher Andrew Knizner on a deal, reports Chris Cotillo of MassLive. If they reach agreement on a big league contract, he’d be in line to back up Cal Raleigh.

Full details on the prospects the Seattle Mariners picked up and lost in Wednesday's Rule 5 Draft during the MLB winter meetings in Florida.

Seattle still wants to address second base, but look to be standing pat at the hot corner. Visit MLB Trade Rumors for more.

For one American League contender, the MLB Winter Meetings closed with a bang Wednesday. For the Mariners, it was more of a whimper.

This article was originally published on www.si.com/mlb/cardinals/onsi as Yankees, Mariners Monitoring Cardinals 2025 Breakout Hurler. The St. Louis Cardinals have multiple hot commodities on the trade block right now.